It was definitely noticeable how there was a rough edge to everyone's acting. It's very telling of how good a job the director can do to bring out the best in people. If only we could know how many takes were made on average with these folks on full fledged commercial productions.
Given that, it's still just very cool to see former Star Trek legends appear in a fan film. True, that telegraphs they have nothing better to do, but then they are also putting aside their egos and simply enjoying it. You have to expect it not to hold up to production quality. Demanding it is folly. Despite the rough feel of OGAM, I enjoyed it and I'm looking forward to seeing what Renegades turns up.
I just wish Cawley would take more acting lessons. He makes Shatner's overacting look terrific.